Answer:
C. 2 kg
Explanation:
From the problem , it appears that due to fall by 800m (h ) , potential energy is converted into heat energy which increases the temperature of water . Let the mass of cylinder falling be M , h be the height
loss of potential energy = Mgh
heat generated = Mgh
let heat generated increases a temperature rise of Δt in the mass of water m
heat absorbed = msΔt , s is specific heat of water .
msΔt = Mgh
Δt = Mgh / ms
Δt = K / m ( M , g , h and s are constant in both the case)
For first case ,
m = 2 kg and Δt = 2.4
2.4 = K / 2
K = 4.8
For second case
Δt = K / m
1.2 = 4.8 / m
m = 4 kg
mass added = 4 - 2
= 2 kg .
In the form of an ion, Al 3+, It will lose 3 electrons
Answer:
+1
Explanation:
There is only on atom of C
Well I must say that's a very interesting machine you've got there. It wouldn't be possible to build a system with an actual mechanical advantage of 2 million. But if you did have such a thing, and you wanted to use it to lift a 2000 pound weight, then you would only need to pull with a force of 1.6% of an ounce ! The bad news is that in order to lift the weight one foot, you'd have to pull about 379 miles of rope through the pulley system !
Human<span> activities contribute to </span>climate<span> change by causing changes in </span>Earth's <span>atmosphere in the amounts of greenhouse gases, aerosols (small particles), and cloudiness.</span>